JP3476042B2 - Picture Luminance Detection Method for Color Filter - Google Patents
Picture Luminance Detection Method for Color FilterInfo
- Publication number
- JP3476042B2 JP3476042B2 JP25072595A JP25072595A JP3476042B2 JP 3476042 B2 JP3476042 B2 JP 3476042B2 JP 25072595 A JP25072595 A JP 25072595A JP 25072595 A JP25072595 A JP 25072595A JP 3476042 B2 JP3476042 B2 JP 3476042B2
- Authority
- JP
- Japan
- Prior art keywords
- picture element
- light receiving
- pixel
- luminance
- horizontal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Landscapes
- Photometry And Measurement Of Optical Pulse Characteristics (AREA)
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、液晶ディスプレー
用カラーフィルタ基板の絵素の輝度検出方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for detecting the brightness of picture elements on a color filter substrate for a liquid crystal display.
【０００２】[0002]
【従来の技術】カラー液晶ディスプレーにおける液晶パ
ネルの構造としては、ガラス基板に透明電極及びＦＥＴ
マトリックス層、液晶層、透明電極、カラーフィルタ、
ガラス基板を積層し、その両ガラス基板の上下に偏光板
を設けて構成される。カラーフィルタは、赤（Ｒ）、緑
（Ｇ）、青（Ｂ）の色ピクセルがドット単位でガラス基
板にコーティングされて配列されており、その配列方法
もＲＧＢが縦方向に整列した縦ストライプ方式、ＲＧＢ
が分散したモザイク方式など種々のものがある。このピ
クセルの透過光輝度が所定の範囲内に収まるよう製作さ
れ、その検査が行われる。2. Description of the Related Art As a structure of a liquid crystal panel in a color liquid crystal display, a glass substrate is provided with a transparent electrode and an FET.
Matrix layer, liquid crystal layer, transparent electrode, color filter,
It is configured by stacking glass substrates and providing polarizing plates above and below both glass substrates. In the color filter, red (R), green (G), and blue (B) color pixels are arrayed by coating them on a glass substrate in dot units, and the arraying method is also a vertical stripe method in which RGB is vertically aligned. , RGB
There are various types, such as a mosaic method in which is dispersed. The pixel is manufactured so that the transmitted light brightness of the pixel is within a predetermined range, and the inspection is performed.
【０００３】図６は絵素の輝度検査方法を説明する図で
ある。各絵素１の輝度はイメージセンサ２を用いて検出
される。イメージセンサ２は、例えば複数個のＣＣＤ素
子（検出素子）を１列に並べたもので、このＣＣＤ素子
を以降は画素と呼びこの画素の出力を画素データと言
い、この画素データから算出された絵素１ごとのデータ
を輝度データと呼ぶことにする。イメージセンサ２を絵
素１の横方向に配置し、絵素１の横方向の中心線Ｊ近傍
の画素３の画素データを積算する。この場合各絵素１と
も同数の画素データを積算する。図６では＋印を付けた
画素３（この場合４個）の積算値となる。FIG. 6 is a diagram for explaining a luminance inspection method for picture elements. The brightness of each picture element 1 is detected by using the image sensor 2. The image sensor 2 has, for example, a plurality of CCD elements (detection elements) arranged in a line, and the CCD elements are hereinafter referred to as pixels, and the output of this pixel is referred to as pixel data, and is calculated from this pixel data. The data for each picture element 1 will be called luminance data. The image sensor 2 is arranged in the horizontal direction of the picture element 1, and the pixel data of the pixels 3 near the horizontal center line J of the picture element 1 are integrated. In this case, the same number of pixel data is integrated for each picture element 1. In FIG. 6, it is the integrated value of the pixels 3 (four in this case) marked with +.
【０００４】[0004]
【発明が解決しようとする課題】絵素１の幅Ｐと画素３
の幅（つまりピッチ）ｐは元来無関係な寸法であるの
で、Ｐはｐの整数倍となっていないのが普通である。こ
のため絵素１の横方向の中心線Ｊと画素３との相対位置
は各絵素１で異なっている。ｃは中心線Ｊとその左側の
画素３の中心線とのずれを示す。各絵素１の輝度の分布
は中心線Ｊを中心にして左右対称となっている場合が多
い。このためずれｃの値が各絵素１で異なっていると、
各絵素１の輝度は同じでも画素データの積算値となる輝
度データは異なってくる。The width P of the picture element 1 and the pixel 3
Since the width (that is, the pitch) p of p is originally an irrelevant dimension, it is usual that P is not an integral multiple of p. Therefore, the relative position between the horizontal centerline J of the picture element 1 and the pixel 3 is different in each picture element 1. Reference character c indicates a deviation between the center line J and the center line of the pixel 3 on the left side thereof. The luminance distribution of each picture element 1 is often bilaterally symmetrical with respect to the center line J. For this reason, if the value of the deviation c is different for each picture element 1,
Even though the brightness of each picture element 1 is the same, the brightness data that is the integrated value of the pixel data is different.
【０００５】図７は絵素１の中心線Ｊとその左側の画素
３の中心線とのずれｃにより輝度が同じ絵素１でも計測
値が異なる場合を示す図である。横軸は画素３の位置を
示し、番号１〜６は画素３の番号を表す。縦軸は画素デ
ータを示す。（Ａ）はずれ量ｃが丁度ｐ／２の場合であ
り、（Ｂ）はずれｃがｐ／２より大きい場合である。Ｔ
は画素３の出力曲線であり、（Ａ）と（Ｂ）では同一の
形状であるが、同じ番号の画素データ、例えばＤ３は
（Ａ）と（Ｂ）では異なる。このため斜線で示される画
素データの積算値は異なり、同じ輝度であってもずれｃ
の存在により異なった値として計測されてしまう。また
画素データを積算するだけなので画素３の出力曲線Ｔを
忠実に積分しておらずこれによる誤差も生じていた。FIG. 7 is a diagram showing a case where the measured values are different even for the picture element 1 having the same luminance due to the deviation c between the center line J of the picture element 1 and the center line of the pixel 3 on the left side thereof. The horizontal axis represents the position of the pixel 3, and the numbers 1 to 6 represent the numbers of the pixel 3. The vertical axis represents pixel data. (A) shows the case where the deviation amount c is just p / 2, and (B) shows the case where the deviation amount c is larger than p / 2. T
Is the output curve of the pixel 3 and has the same shape in (A) and (B), but the pixel data of the same number, for example D3, is different in (A) and (B). Therefore, the integrated value of the pixel data indicated by the diagonal lines is different, and even if the brightness is the same, the deviation c
Will be measured as different values due to the existence of. Further, since the pixel data is only integrated, the output curve T of the pixel 3 is not faithfully integrated, and an error is caused due to this.
【０００６】本発明は上述の問題に鑑みてなされたもの
で、絵素の横方向および縦方向の中心線と画素位置との
ずれによる絵素毎の輝度データの計測誤差を少なくする
ことを目的とする。また画素の出力曲線をできるだけ忠
実に積分して絵素の輝度データの計測誤差を少なくする
ことを目的とする。The present invention has been made in view of the above problems, and it is an object of the present invention to reduce the measurement error of the luminance data for each picture element due to the deviation between the horizontal and vertical centerlines of the picture element and the pixel position. And Another object is to reduce the measurement error of the luminance data of the picture element by integrating the output curve of the pixel as faithfully as possible.
【０００７】[0007]
【０００８】[0008]
【０００９】[0009]
【課題を解決するための手段】 上記目的を達成するた
め、
請求項１の発明は、横方向及び縦方向に並んでカラ
ーフィルタを構成する同一形状の矩形の絵素より小さな
複数の同一寸法の受光素子からなるイメージセンサを用
いて、該イメージセンサの受光素子を１つの絵素につき
横方向及び縦方向に複数割り当て、この割り当てられた
複数の受光素子の検出値に基づいてカラーフィルタの絵
素の輝度を検出するカラーフィルタの絵素輝度検出方法
において、各絵素に割り当てられた受光素子の出力を縦
軸にとり、横方向に並ぶ各受光素子の中心位置を横軸に
とり、隣接する受光素子の出力を直線で結んだ近似出力
曲線を求め、この近似出力曲線と絵素の横方向の中心線
との交点を中心仮想点データとし、前記中心線の横方向
左右に受光素子のピッチごとに設けた縦軸に平行な直線
と前記近似出力曲線との交点を仮想点データとし、前記
近似出力曲線、絵素の横方向中心線からそれぞれ左右に
所定の等しいピッチ数で離れて位置する２つの仮想点デ
ータをそれぞれ通る前記縦軸に平行な２つの直線及び前
記横軸により囲まれる領域を、受光素子の各出力を通る
縦軸に平行な直線、中心仮想点データを通る縦軸に平行
な直線及び各仮想点データを通る縦軸に平行な直線で分
割し、この分割された領域の面積をそれぞれ算出し、算
出された各面積の加算値を各絵素の１次元輝度とする。 In order to solve the problem] was to achieve the above purpose
Therefore, the invention of claim 1 is arranged in the horizontal and vertical directions.
-Small than rectangular pixels of the same shape that make up the filter
Uses an image sensor consisting of multiple light receiving elements of the same size
There are, per a light-receiving element of the image sensor in a single picture element
Multiple assignment in the transverse and longitudinal directions, were the assigned
Picture of a color filter based on the detection values of multiple light receiving elements
In the pixel brightness detecting method of a color filter for detecting the brightness of the unit, taken ordinate the output of the light receiving element assigned to each picture element, the center position of the light receiving elements arranged in the horizontal direction horizontal axis, adjacent the light receiving obtains an approximate output curve connecting the output of the device in a straight line, the intersection of the center line of the approximate output curve and the pixel in the horizontal direction as the center ideal point data, each pitch of the light receiving element in the lateral direction left and right of the center line The virtual intersection data is the intersection of the straight line parallel to the vertical axis provided in the above and the approximate output curve, and the approximate output curve and the horizontal center line of the picture element are to the left and right respectively.
Two virtual point data located at a predetermined equal pitch number
Two straight lines parallel to the vertical axis and front
The area surrounded by the horizontal axis passes through each output of the light receiving element.
Straight line parallel to the vertical axis, parallel to the vertical axis that passes through the central virtual point data
A straight line and a straight line parallel to the vertical axis passing through each virtual point data.
Divide and calculate the area of each divided area,
The one-dimensional luminance of each picture element is defined as the added value of each area that has been output.
【００１０】各絵素の隣接する受光素子の出力を直線で
結ぶことにより近似出力曲線を容易に得ることができ
る。この近似出力曲線と絵素の横方向の中心線との交点
の高さを中心仮想点データとし、中心線の横方向左右に
受光素子のピッチごとに設けた縦軸に平行な直線と近似
出力曲線との交点の高さを仮想点データとする。前記近
似出力曲線、絵素の横方向中心線からそれぞれ左右に所
定の等しいピッチ数で離れて位置する２つの仮想点デー
タをそれぞれ通る前記縦軸に平行な２つの直線及び前記
横軸により囲まれる領域を、受光素子の各出力を通る縦
軸に平行な直線、中心仮想点データを通る縦軸に平行な
直線及び各仮想点データを通る縦軸に平行な直線で分割
し、この分割された領域の面積をそれぞれ算出し、算出
された各面積の加算値を各絵素の輝度とする。これによ
り各絵素の輝度を受光素子との相対位置に関係なく計測
でき、従来の近似積分より輝度を精度よく計測できる。
また、面積の計算が容易となり、輝度の算出を迅速に行
うことができる。An approximate output curve can be easily obtained by connecting the outputs of the adjacent light receiving elements of each picture element with a straight line. The height of the intersection of this approximate output curve and the horizontal centerline of the picture element is defined as the center virtual point data, and the height is set to the left and right of the centerline in the horizontal direction.
The height of the intersection of the straight line parallel to the vertical axis provided for each pitch of the light receiving elements and the approximate output curve is taken as virtual point data. Near the above
Similar output curve, to the left and right of the horizontal centerline of the pixel
Two virtual point data that are separated by a fixed equal number of pitches
And two straight lines that are parallel to the vertical axis and
The area surrounded by the horizontal axis is the vertical line that passes through each output of the light receiving element.
A straight line parallel to the axis, parallel to the vertical axis passing through the central virtual point data
Divide by a straight line and a straight line parallel to the vertical axis that passes each virtual point data
Then, calculate the area of each of these divided areas, and calculate
The added value of each area thus obtained is taken as the luminance of each picture element. By this
The brightness of each picture element is measured regardless of the relative position to the light receiving element.
Therefore, the brightness can be measured more accurately than the conventional approximate integration.
Moreover, the area can be easily calculated , and the brightness can be calculated quickly.
【００１１】請求項２の発明は、請求項１の前記各絵素
の１次元輝度を各絵素の縦方向に受光素子複数個分につ
いて求め、この和を各絵素の輝度とする。これにより絵
素を２次元的に検出するので絵素の輝度を精度よく計測
することができる。According to a second aspect of the present invention, the one-dimensional luminance of each picture element of the first aspect is obtained for a plurality of light receiving elements in the vertical direction of each picture element, and the sum is used as the luminance of each picture element. As a result, the picture element is detected two-dimensionally, so that the luminance of the picture element can be measured with high accuracy.
【００１２】 請求項３の発明は、請求項１の前記各絵
素の１次元輝度を各絵素の縦方向に受光素子複数個分に
ついて求め、請求項１記載の方法における横方向の受光
素子の出力を縦方向の受光素子の出力として前記１次元
輝度におきかえ、絵素の縦方向の中心線を基準にして求
めた積分値または面積を各絵素の輝度とする。これによ
り輝度の縦方向の分布も横方向と同様精度よく検出で
き、絵素の輝度を精度よく計測でき、計算を迅速に行う
ことができる。[0012] The invention according to claim 3, obtains the one-dimensional luminance of each picture element of claim 1 for the light-receiving element plural component in the longitudinal direction of each picture element, the light receiving in the lateral direction in the method of claim 1, wherein < The output of the element is replaced with the one-dimensional luminance as the output of the light receiving element in the vertical direction, and the integrated value or area obtained with reference to the vertical centerline of the pixel is used as the luminance of each pixel. As a result, the luminance distribution in the vertical direction can be detected with high accuracy as in the horizontal direction, the brightness of the picture element can be measured with high accuracy, and the calculation can be performed quickly.
【００１３】[0013]
【発明の実施の形態】以下、本発明の実施の形態につい
て図面を参照して説明する。図１は第１の実施の形態を
示す図で絵素に対するイメージセンサの検出素子の出力
から輝度を算出する方法を示す図である。図１〜５にお
いて図６〜７と同一機能を有するものは同一符号で表
す。各絵素１の輝度は図６で説明したと同一の方法で検
出する。すなわち絵素１をイメージセンサ２で測定す
る。このイメージセンサ２はＣＣＤ素子で構成されてい
るものを用いる。先に説明したようにこのＣＣＤ素子を
以降は画素と呼びこの画素の出力を画素データと言い、
この画素データから算出された絵素１ごとのデータを輝
度データと呼ぶことにする。図１の横軸は画素の位置を
画素の番号で表している。縦軸は画素の出力、つまり画
素データを示す。画素データＤｋは画素番号ｋの画素デ
ータを表す。Ｊは絵素１の横方向の中心線を表し、ｃは
この中心線Ｊとその左側の画素３の中心線とのずれを示
す。ｐは画素３の横方向のピッチで中心線Ｊより横方向
左右へ記載してある。画素データＤｋ（Ｄ１〜Ｄ６）を
通る出力曲線Ｔを公知の数学的方法で求める。中心線Ｊ
の左右２ｐの間にわたり出力曲線Ｔを積分しこの値（斜
線で示す範囲）を絵素１の１次元輝度とする。積分範囲
は中心線Ｊの左右２ｐとしたがこれに限定されない。ま
た、イメージセンサ２は検出素子としてホトセンサ等の
受光素子を用いてもよい。また、イメージセンサ２は１
次元または２次元イメージセンサを用いることができ
る。BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a diagram showing a first embodiment and is a diagram showing a method of calculating luminance from an output of a detection element of an image sensor for a picture element. In FIGS. 1 to 5, components having the same functions as those in FIGS. The brightness of each picture element 1 is detected by the same method as described with reference to FIG. That is, the picture element 1 is measured by the image sensor 2. As the image sensor 2, a CCD element is used. As described above, this CCD element is hereinafter called a pixel, and the output of this pixel is called pixel data.
The data for each picture element 1 calculated from this pixel data will be called luminance data. The horizontal axis of FIG. 1 represents pixel positions by pixel numbers. The vertical axis represents pixel output, that is, pixel data. The pixel data Dk represents the pixel data of the pixel number k. J represents the horizontal center line of the picture element 1, and c represents the deviation between this center line J and the center line of the pixel 3 on the left side thereof. p is the pitch of the pixels 3 in the horizontal direction, and is described in the horizontal direction from the center line J. An output curve T passing through the pixel data Dk (D1 to D6) is obtained by a known mathematical method. Center line J
The output curve T is integrated over the right and left 2p of, and this value (the range indicated by the diagonal lines) is the one-dimensional luminance of the picture element 1. The integration range is set to 2p to the left and right of the center line J, but is not limited to this. Further, the image sensor 2 may use a light receiving element such as a photo sensor as a detection element. Also, the image sensor 2 is 1
A two-dimensional or two-dimensional image sensor can be used.
【００１４】図２はイメージセンサ２で絵素１の縦方向
に画素３の縦方向の長さずつ移動して各１次元輝度を求
め加算して２次元輝度を求める説明図である。このよう
に絵素１の横方向と縦方向の輝度を求めることにより絵
素１の正確な輝度を得ることができる。図２では縦方向
は４個の画素３を加算したが、これに限定する必要はな
い。なお横方向のピッチｐの数と縦方向の画素３の数は
各絵素１とも同数とする。FIG. 2 is an explanatory diagram for obtaining the two-dimensional luminance by moving the picture element 1 in the vertical direction of the pixel 3 by the vertical length of the pixel 3 to obtain each one-dimensional luminance and adding them by the image sensor 2. By thus obtaining the horizontal and vertical luminances of the picture element 1, the accurate luminance of the picture element 1 can be obtained. In FIG. 2, four pixels 3 are added in the vertical direction, but the number is not limited to this. The number of horizontal pitches p and the number of vertical pixels 3 are the same for each picture element 1.
【００１５】図３は第２の実施の形態を示す図で絵素に
対するイメージセンサのＣＣＤ素子（検出素子）の出力
から輝度を算出する方法を示す図である。図３の横軸、
縦軸の表示、中心線Ｊ、画素データＤｋ、ずれｃ、ピッ
チｐは図１と同じ意味を表す。まず各画素３の出力、つ
まり画素データＤｋを直線で結び近似出力曲線Ｔ’を得
る。次に絵素１の横方向中心線Ｊと近似出力曲線Ｔ’の
交点を中心仮想点データとして求め、中心線Ｊより画素
３の横方向左右にピッチｐごとに縦軸に平行な線と近似
出力曲線Ｔ’との交点を仮想点データＤｋ’として求め
る。中心線Ｊより左右同じピッチｐの位置の間の近似出
力曲線Ｔ’の面積を求める。図３では左右２ｐづつ、Ｄ
１’よりＤ５’の面積を台形近似により求める。FIG. 3 is a diagram showing a second embodiment and is a diagram showing a method of calculating luminance from an output of a CCD element (detection element) of an image sensor for a picture element. The horizontal axis of Fig. 3,
The vertical axis display, center line J, pixel data Dk, shift c, and pitch p have the same meanings as in FIG. First, the output of each pixel 3, that is, the pixel data Dk is connected by a straight line to obtain an approximate output curve T ′. Next, the intersection of the horizontal centerline J of the picture element 1 and the approximate output curve T ′ is obtained as central virtual point data, and is approximated to a line parallel to the vertical axis at every pitch p to the left and right of the pixel 3 in the horizontal direction from the centerline J. An intersection with the output curve T'is obtained as virtual point data Dk '. From the center line J, the area of the approximate output curve T'between the positions of the same pitch p on the left and right is obtained. In Figure 3, 2p on each side, D
The area of D5 'from 1'is obtained by trapezoidal approximation.
【００１６】図４で仮想点データの値Ｄｋ’の算出方法
を示す。Ｄ３’を例にとり説明する。Ｄｋは画素３の幅
（ピッチ）ｐの中心（ｐ／２）にあり、画素番号３の画
素の中心Ｄ３は中心線Ｊよりｃ離れ、画素番号４の画素
中心Ｄ４は中心線Ｊよりｐ−ｃ離れている。この場合Ｄ
３’は内分点の計算法により次の式で表される。
Ｄ３’＝Ｄ３（ｃ／ｐ）＋Ｄ４（１−ｃ／ｐ）…（１）
これよりＤｋ’は次のように表される。
Ｄｋ’＝Ｄｋ（ｃ／ｐ）＋Ｄｋ＋１（１−ｃ／ｐ）…（２）FIG. 4 shows a method of calculating the value Dk 'of the virtual point data. Description will be made by taking D3 'as an example. Dk is in the center (p / 2) of the width (pitch) p of the pixel 3, the center D3 of the pixel of the pixel number 3 is c away from the center line J, and the pixel center D4 of the pixel number 4 is p− from the center line J. c away. In this case D
3'is represented by the following formula by the calculation method of the internal division point. D3 '= D3 (c / p) + D4 (1-c / p) ... (1) From this, Dk' is represented as follows. Dk '= Dk (c / p) + Dk + 1 (1-c / p) ... (2)
【００１７】図３で分割された面積のうち右側をＡ、左
側をＢとする。この場合中心線Ｊより左右２画素の計４
画素の積算値Ｓを求める。
Ｓ＝Ｂ１＋Ａ２＋Ｂ２＋Ａ３＋Ｂ３＋Ａ４＋Ｂ４＋Ａ５…（３）
各面積Ｂｋ，Ａｋは台形として計算する。Of the areas divided in FIG. 3, the right side is A and the left side is B. In this case, a total of 4 pixels with 2 pixels on the left and right from the center line J
The integrated value S of pixels is calculated. S = B1 + A2 + B2 + A3 + B3 + A4 + B4 + A5 (3) Each area Bk, Ak is calculated as a trapezoid.
【００１８】このようにして１次元の輝度を求めた後、
図２で説明したように絵素１の縦方向に画素３を移動し
て輝度を求める。図２で示したように縦方向４画素にわ
たり輝度を積算する場合は、各縦方向の画素３について
１次元輝度を（３）式で求め、その４個の面積を加算す
ればよい。After obtaining the one-dimensional luminance in this way,
As described with reference to FIG. 2, the pixel 3 is moved in the vertical direction of the picture element 1 to obtain the luminance. When the luminance is integrated over four pixels in the vertical direction as shown in FIG. 2, the one-dimensional luminance of each pixel 3 in the vertical direction is calculated by the equation (3), and the four areas may be added.
【００１９】図５は第３の実施の形態を説明する図であ
る。本実施の形態は絵素の縦方向の輝度の分布も横方向
と同様の方法で精度よく求めるものである。画素３の横
方向の長さをｐ、縦方向の長さをｑ、絵素１の縦方向の
中心線をＫ、積分範囲をＬとし、縦方向における画素３
の１次元輝度をＥ１〜Ｅ４とする。この値を図１のＤ２
〜Ｄ５に代入すれば図１で説明したと同じ方法で斜線で
示した面積を計算することができる。この面積が絵素１
の輝度を表す。またこのＥ１〜Ｅ４を図３のＤ２〜Ｄ５
に代入すれば図３、４で説明したと同じ方法で斜線で示
した面積を近似的に計算することができる。縦方向４個
の画素としたが、６個とすれば図１、３の場合と同じに
なり精度が向上する。FIG. 5 is a diagram for explaining the third embodiment. In this embodiment, the luminance distribution in the vertical direction of a picture element is also accurately obtained by the same method as in the horizontal direction. The horizontal length of the pixel 3 is p, the vertical length is q, the vertical centerline of the picture element 1 is K, and the integration range is L.
Let the one-dimensional luminance of E1 to E4. This value is D2 in Figure 1.
By substituting it for ~ D5, the shaded area can be calculated by the same method as described in FIG. This area is picture element 1
Represents the brightness of. These E1 to E4 are replaced with D2 to D5 in FIG.
By substituting in, the shaded area can be approximately calculated by the same method as described in FIGS. Although there are four pixels in the vertical direction, if the number of pixels is six, the same as in the case of FIGS.
【００２０】以上の説明より明らかなように、本発明は
各受光素子の出力を直線で結んで近似出力曲線を求め、
絵素の横方向中心線より左右に画素のピッチ毎に縦軸に
平行な線を設け、この平行な線及び絵素の中心線と近似
出力曲線との交点を仮想点データとし、絵素の中心線よ
り左右所定の長さにある平行線と近似出力曲線で囲まれ
る面積を、隣接する画素データと仮想点データで構成さ
れる台形の面積の積算値として求めることにより、検出
素子と絵素との相対位置に関係なく絵素の輝度を計算精
度の低下を押さえて容易に算出することができる。この
ようにして求めた１次元輝度を縦方向に加算することに
より絵素の輝度を求めることができる。この１次元輝度
を縦方向に請求項１の方法で求めることによりさらに精
度よく絵素の輝度を求めることができる。As is clear from the above description, the present invention connects the outputs of the respective light receiving elements with a straight line to obtain an approximate output curve,
Lines parallel to the vertical axis are provided for each pixel pitch to the left and right of the horizontal centerline of the picture element, and the intersections of this parallel line and the centerline of the picture element and the approximate output curve are used as virtual point data. The area surrounded by the parallel lines and the approximate output curve, which have a predetermined length from the center line to the left and right, is calculated as the integrated value of the area of the trapezoid formed by the adjacent pixel data and virtual point data, and It is possible to easily calculate the luminance of the picture element regardless of the relative position with respect to it, while suppressing the decrease in calculation accuracy. The luminance of the picture element can be obtained by vertically adding the one-dimensional luminance thus obtained. By obtaining the one-dimensional luminance in the vertical direction by the method according to the first aspect, the luminance of the picture element can be obtained more accurately.
【図１】本発明の第１の実施形態の計算方法を示す図で
ある。FIG. 1 is a diagram showing a calculation method according to a first embodiment of the present invention.
【図２】イメージセンサ２を絵素１の縦方向に画素３の
縦方向の長さづづ移動して各１次元輝度を求め加算して
２次元輝度を求める説明図である。FIG. 2 is an explanatory diagram for obtaining a two-dimensional luminance by moving the image sensor 2 in the vertical direction of the picture element 1 by the length of the pixel 3 in the vertical direction and obtaining and adding each one-dimensional luminance.
【図３】本発明の第２の実施形態の計算方法を示す図で
ある。FIG. 3 is a diagram showing a calculation method according to a second embodiment of the present invention.
【図４】仮想点データの値Ｄｋ’の算出方法を示す図で
ある。FIG. 4 is a diagram showing a method of calculating a value Dk ′ of virtual point data.
【図５】本発明の第３の実施形態を示す図である。FIG. 5 is a diagram showing a third embodiment of the present invention.
【図６】絵素の輝度検査方法を説明する図である。FIG. 6 is a diagram illustrating a luminance inspection method of a picture element.
【図７】従来の輝度計算方法を示し、（Ａ）は絵素の横
方向中心線と左側の画素の中心線の位置が丁度ｐ／２ず
れている場合、（Ｂ）は絵素の横方向中心線と左側の画
素の中心線がｐ／２以上ずれており輝度検出誤差が生じ
る場合を示す図である。FIG. 7 shows a conventional brightness calculation method, where (A) shows a case where the horizontal center line of a pixel and the center line of a pixel on the left are displaced by p / 2, and (B) shows a horizontal direction of the pixel. FIG. 6 is a diagram showing a case where a directional center line and a center line of a pixel on the left side are deviated from each other by p / 2 or more and a luminance detection error occurs.
１ 絵素 ２ イメージセンサ ３ 画素 Ｊ 絵素の横方向中心線 Ｋ 絵素の縦方向中心線 Ｔ 出力曲線 Ｔ’近似出力曲線 Ｐ 絵素の幅 ｐ 画素の横方向ピッチ ｑ 画素の縦方向ピッチ ｃ 絵素の中心線と左側の画素の中心線とのずれ Ｄｋ 画素データ Ｄｋ’仮想点データ Ｅｋ １次元輝度データ 1 picture element 2 image sensor 3 pixels Horizontal center line of J picture element Vertical centerline of K picture element T output curve T'approximate output curve P picture element width Lateral pitch of p pixels q Pixel vertical pitch c Deviation between center line of picture element and center line of left pixel Dk pixel data Dk 'virtual point data Ek 1-dimensional brightness data
フロントページの続き (72)発明者 小川 俊昭 東京都江東区豊洲３丁目１番15号 石川 島播磨重工業株式会社 東二テクニカル センター内 (72)発明者 塩田 朋彦 東京都江東区豊洲３丁目１番15号 石川 島播磨重工業株式会社 東二テクニカル センター内 (72)発明者 大石 圭三 東京都江東区豊洲３丁目１番15号 石川 島播磨重工業株式会社 東二テクニカル センター内 (56)参考文献 特開 平６−11679（ＪＰ，Ａ) 特開 平５−60603（ＪＰ，Ａ) 特開 平６−221811（ＪＰ，Ａ) 特開 平８−75542（ＪＰ，Ａ) 特開 平５−240802（ＪＰ，Ａ) (58)調査した分野(Int.Cl.7，ＤＢ名) G01J 1/00 - 1/04 G01J 1/42 - 1/46 G01J 11/00 G01M 11/00 G01B 11/00 - 11/30 102 G01N 21/84 - 21/958 G02B 5/20 Front Page Continuation (72) Inventor Toshiaki Ogawa 3-15-1, Toyosu, Koto-ku, Tokyo Ishikawa Shima Harima Heavy Industries, Ltd. Toni Technical Center (72) Inventor Tomohiko Shiota 3-1-15-1, Toyosu, Koto-ku, Tokyo No. Ishikawa Shima Harima Heavy Industries Co., Ltd. Toni Technical Center (72) Inventor Keizo Oishi 3-15 Toyosu, Koto-ku, Tokyo Ishikawa Shima Harima Heavy Industries Co., Ltd. Toni Technical Center (56) Reference JP-A-6 -11679 (JP, A) JP 5-60603 (JP, A) JP 6-221811 (JP, A) JP 8-75542 (JP, A) JP 5-240802 (JP, A) (58) Fields surveyed (Int.Cl. 7 , DB name) G01J 1/00-1/04 G01J 1/42-1/46 G01J 11/00 G01M 11/00 G01B 11/00-11/30 102 G01N 21/84-21/958 G02B 5/20
Claims (3)
タを構成する同一形状の矩形の絵素より小さな複数の同
一寸法の受光素子からなるイメージセンサを用いて、該
イメージセンサの受光素子を１つの絵素につき横方向及
び縦方向に複数割り当て、この割り当てられた複数の受
光素子の検出値に基づいてカラーフィルタの絵素の輝度
を検出するカラーフィルタの絵素輝度検出方法におい
て、 各絵素に割り当てられた受光素子の出力を縦軸にとり、
横方向に並ぶ各受光素子の中心位置を横軸にとり、隣接
する受光素子の出力を直線で結んだ近似出力曲線を求
め、この近似出力曲線と絵素の横方向の中心線との交点
を中心仮想点データとし、前記中心線の横方向左右に受
光素子のピッチごとに設けた縦軸に平行な直線と前記近
似出力曲線との交点を仮想点データとし、前記近似出力
曲線、絵素の横方向中心線からそれぞれ左右に所定の等
しいピッチ数で離れて位置する２つの仮想点データをそ
れぞれ通る前記縦軸に平行な２つの直線及び前記横軸に
より囲まれる領域を、受光素子の各出力を通る縦軸に平
行な直線、中心仮想点データを通る縦軸に平行な直線及
び各仮想点データを通る縦軸に平行な直線で分割し、こ
の分割された領域の面積をそれぞれ算出し、算出された
各面積の加算値を各絵素の１次元輝度とすることを特徴
とするカラーフィルタの絵素輝度検出方法。1. An image sensor comprising a plurality of light receiving elements of the same size, which are smaller than rectangular picture elements of the same shape that form color filters in a row in the horizontal direction and in the vertical direction. A plurality of pixel elements are horizontally and vertically assigned to each picture element, and the luminance of the picture element of the color filter is detected based on the detected values of the plurality of light receiving elements thus assigned. The output of the light receiving element assigned to
Taking the center position of each light receiving element lined up in the horizontal direction as the horizontal axis, obtain an approximate output curve that connects the outputs of adjacent light receiving elements with a straight line, and center the intersection of this approximate output curve and the horizontal center line of the pixel. As virtual point data, the intersection of a straight line parallel to the vertical axis provided for each pitch of the light receiving elements on the left and right of the center line in the lateral direction and the approximate output curve is set as virtual point data, and the approximate output curve and the horizontal direction of the pixel are set. Each output of the light receiving element is defined by a region surrounded by two straight lines parallel to the vertical axis and two horizontal axes that respectively pass through two virtual point data that are spaced apart from each other by a predetermined equal number of pitches from the directional center line. It is divided into a straight line parallel to the vertical axis passing through, a straight line parallel to the vertical axis passing through the central virtual point data, and a straight line parallel to the vertical axis passing through each virtual point data, and the area of each of these divided regions is calculated and calculated. The added value of each area Pixel luminance detection method of a color filter, which comprises a one-dimensional luminance elementary.
向に受光素子複数個分について求め、この和を各絵素の
輝度とすることを特徴とする請求項１記載のカラーフィ
ルタの絵素輝度検出方法。2. The color according to claim 1, wherein the one-dimensional luminance of each picture element is obtained for a plurality of light receiving elements in the vertical direction of each picture element, and the sum is used as the luminance of each picture element. Filter picture element brightness detection method.
向に受光素子複数個分について求め、請求項１記載の方
法における横方向の受光素子の出力を縦方向の受光素子
の出力として前記１次元輝度におきかえ、絵素の縦方向
の中心線を基準にして求めた積分値または面積を各絵素
の輝度とすることを特徴とする請求項１記載のカラーフ
ィルタの絵素輝度検出方法。3. A calculated for the light-receiving element a plurality min the 1-dimensional luminance of each picture element in the vertical direction of each picture element, in the longitudinal direction of the light receiving element outputs in the lateral direction of the light receiving element in the method according to claim 1 The picture element of the color filter according to claim 1, wherein the picture element of the color filter is replaced with the one-dimensional brightness as an output, and an integrated value or an area obtained with reference to a vertical centerline of the picture element is used as the brightness of each picture element. Luminance detection method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25072595A JP3476042B2 (en) | 1995-09-28 | 1995-09-28 | Picture Luminance Detection Method for Color Filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25072595A JP3476042B2 (en) | 1995-09-28 | 1995-09-28 | Picture Luminance Detection Method for Color Filter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0989660A JPH0989660A (en) | 1997-04-04 |
| JP3476042B2 true JP3476042B2 (en) | 2003-12-10 |
Family
ID=17212126
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP25072595A Expired - Fee Related JP3476042B2 (en) | 1995-09-28 | 1995-09-28 | Picture Luminance Detection Method for Color Filter |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3476042B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4053571B2 (en) * | 2006-07-05 | 2008-02-27 | シャープ株式会社 | Luminance calculation method, luminance calculation device, inspection device, luminance calculation program, and computer-readable recording medium |
| JP6100077B2 (en) * | 2013-05-01 | 2017-03-22 | キヤノン株式会社 | Light source device and control method thereof |
-
1995
- 1995-09-28 JP JP25072595A patent/JP3476042B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0989660A (en) | 1997-04-04 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US12020624B2 (en) | Display substrate and display device | |
| WO2020150963A1 (en) | Pixel arrangement structure, display panel and display apparatus | |
| US6995796B2 (en) | Image sensor for digital cameras | |
| CN101455075B (en) | System and method for a high performance color filter mosaic array | |
| CN102959958B (en) | Color imaging device | |
| US8259213B2 (en) | Digital camera and digital camera system | |
| CN110603578B (en) | Full panel display of display device | |
| JP2000050294A (en) | Color filter array having pixel pattern used for obtaining luminance and chrominance value | |
| CN104412579B (en) | Color image sensor and camera head | |
| CN103700329B (en) | The display packing of display panel | |
| CN101467444A (en) | Solid-state image sensor | |
| CN102291554B (en) | Uniformity regulating method for brightness and chrominance of screen | |
| WO2017016169A1 (en) | Pixel array, display device and display method therefor | |
| CN112419966B (en) | Method for correcting pixel brightness of nonstandard interval between display units | |
| CN110146036A (en) | A kind of method for three-dimensional measurement and system based on optical grating projection and binocular polarization camera | |
| EP0204469B1 (en) | Optical low pass filter for a solid state color camera | |
| CN107071371A (en) | The camera lens colour brightness calibration method and device of panoramic shooting module | |
| CN106067937A (en) | Camera lens module array, image sensering device and digital zooming image interfusion method | |
| CN112185301A (en) | Display device correction method and device and processor | |
| JP3476042B2 (en) | Picture Luminance Detection Method for Color Filter | |
| CN105979233A (en) | Mosaic removing method, image processor and image sensor | |
| JP2815497B2 (en) | Color video camera | |
| JPH0575797A (en) | Adjustment device for image pickup element optical unit | |
| JP3669045B2 (en) | Color filter color unevenness inspection system for liquid crystal | |
| TWI715269B (en) | Image processing method and associated image processing circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |